The Mirka® LEROS Interface Pad (9in, 25 Hole, 1ea) pairs with the complete dustless Drywall Sanding Kit to remove sanding dust and potentially harmful particles from the air. Interface pads are used for sanding rounded surfaces and contours in combination with grip sanding abrasives. Using an interface pad will also produce a softer result. The Interface pad is placed between the backing pad and the sanding disc.